First bypass your router and see if you can the port test passes. Seems a couple users had issues with their ISP's blocking the ports. Next, try from a different computer, since not only the router, but your firewall and any possible AV on your computer needs to allow it. 3rd, looks like that port needs special programming. Here is a pretty decent break down:
http://forum.teamspeak.com/showthread.php?t=46934
or
http://segmentnext.com/2009/12/21/team-speak-3-server-guide/
or
http://forums.pcwintech.com/index.php?topic=1195.0 (Verizon)
or
http://www.youtube.com/watch?v=VpKJWLKY-8M (Video)